android_kernel_xiaomi_sm8350/sound/usb/usx2y/usx2yhwdeppcm.c
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00

795 lines
25 KiB
C

/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* USX2Y "rawusb" aka hwdep_pcm implementation
Its usb's unableness to atomically handle power of 2 period sized data chuncs
at standard samplerates,
what led to this part of the usx2y module:
It provides the alsa kernel half of the usx2y-alsa-jack driver pair.
The pair uses a hardware dependant alsa-device for mmaped pcm transport.
Advantage achieved:
The usb_hc moves pcm data from/into memory via DMA.
That memory is mmaped by jack's usx2y driver.
Jack's usx2y driver is the first/last to read/write pcm data.
Read/write is a combination of power of 2 period shaping and
float/int conversation.
Compared to mainline alsa/jack we leave out power of 2 period shaping inside
snd-usb-usx2y which needs memcpy() and additional buffers.
As a side effect possible unwanted pcm-data coruption resulting of
standard alsa's snd-usb-usx2y period shaping scheme falls away.
Result is sane jack operation at buffering schemes down to 128frames,
2 periods.
plain usx2y alsa mode is able to achieve 64frames, 4periods, but only at the
cost of easier triggered i.e. aeolus xruns (128 or 256frames,
2periods works but is useless cause of crackling).
This is a first "proof of concept" implementation.
Later, funcionalities should migrate to more apropriate places:
Userland:
- The jackd could mmap its float-pcm buffers directly from alsa-lib.
- alsa-lib could provide power of 2 period sized shaping combined with int/float
conversation.
Currently the usx2y jack driver provides above 2 services.
Kernel:
- rawusb dma pcm buffer transport should go to snd-usb-lib, so also snd-usb-audio
devices can use it.
Currently rawusb dma pcm buffer transport (this file) is only available to snd-usb-usx2y.
*/
#include <linux/delay.h>
#include <linux/gfp.h>
#include "usbusx2yaudio.c"
#if defined(USX2Y_NRPACKS_VARIABLE) || (!defined(USX2Y_NRPACKS_VARIABLE) && USX2Y_NRPACKS == 1)
#include <sound/hwdep.h>
static int usX2Y_usbpcm_urb_capt_retire(struct snd_usX2Y_substream *subs)
{
struct urb *urb = subs->completed_urb;
struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
int i, lens = 0, hwptr_done = subs->hwptr_done;
struct usX2Ydev *usX2Y = subs->usX2Y;
if (0 > usX2Y->hwdep_pcm_shm->capture_iso_start) { //FIXME
int head = usX2Y->hwdep_pcm_shm->captured_iso_head + 1;
if (head >= ARRAY_SIZE(usX2Y->hwdep_pcm_shm->captured_iso))
head = 0;
usX2Y->hwdep_pcm_shm->capture_iso_start = head;
snd_printdd("cap start %i\n", head);
}
for (i = 0; i < nr_of_packs(); i++) {
if (urb->iso_frame_desc[i].status) { /* active? hmm, skip this */
snd_printk(KERN_ERR "activ frame status %i. Most propably some hardware problem.\n", urb->iso_frame_desc[i].status);
return urb->iso_frame_desc[i].status;
}
lens += urb->iso_frame_desc[i].actual_length / usX2Y->stride;
}
if ((hwptr_done += lens) >= runtime->buffer_size)
hwptr_done -= runtime->buffer_size;
subs->hwptr_done = hwptr_done;
subs->transfer_done += lens;
/* update the pointer, call callback if necessary */
if (subs->transfer_done >= runtime->period_size) {
subs->transfer_done -= runtime->period_size;
snd_pcm_period_elapsed(subs->pcm_substream);
}
return 0;
}
static inline int usX2Y_iso_frames_per_buffer(struct snd_pcm_runtime *runtime,
struct usX2Ydev * usX2Y)
{
return (runtime->buffer_size * 1000) / usX2Y->rate + 1; //FIXME: so far only correct period_size == 2^x ?
}
/*
* prepare urb for playback data pipe
*
* we copy the data directly from the pcm buffer.
* the current position to be copied is held in hwptr field.
* since a urb can handle only a single linear buffer, if the total
* transferred area overflows the buffer boundary, we cannot send
* it directly from the buffer. thus the data is once copied to
* a temporary buffer and urb points to that.
*/
static int usX2Y_hwdep_urb_play_prepare(struct snd_usX2Y_substream *subs,
struct urb *urb)
{
int count, counts, pack;
struct usX2Ydev *usX2Y = subs->usX2Y;
struct snd_usX2Y_hwdep_pcm_shm *shm = usX2Y->hwdep_pcm_shm;
struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
if (0 > shm->playback_iso_start) {
shm->playback_iso_start = shm->captured_iso_head -
usX2Y_iso_frames_per_buffer(runtime, usX2Y);
if (0 > shm->playback_iso_start)
shm->playback_iso_start += ARRAY_SIZE(shm->captured_iso);
shm->playback_iso_head = shm->playback_iso_start;
}
count = 0;
for (pack = 0; pack < nr_of_packs(); pack++) {
/* calculate the size of a packet */
counts = shm->captured_iso[shm->playback_iso_head].length / usX2Y->stride;
if (counts < 43 || counts > 50) {
snd_printk(KERN_ERR "should not be here with counts=%i\n", counts);
return -EPIPE;
}
/* set up descriptor */
urb->iso_frame_desc[pack].offset = shm->captured_iso[shm->playback_iso_head].offset;
urb->iso_frame_desc[pack].length = shm->captured_iso[shm->playback_iso_head].length;
if (atomic_read(&subs->state) != state_RUNNING)
memset((char *)urb->transfer_buffer + urb->iso_frame_desc[pack].offset, 0,
urb->iso_frame_desc[pack].length);
if (++shm->playback_iso_head >= ARRAY_SIZE(shm->captured_iso))
shm->playback_iso_head = 0;
count += counts;
}
urb->transfer_buffer_length = count * usX2Y->stride;
return 0;
}
static inline void usX2Y_usbpcm_urb_capt_iso_advance(struct snd_usX2Y_substream *subs,
struct urb *urb)
{
int pack;
for (pack = 0; pack < nr_of_packs(); ++pack) {
struct usb_iso_packet_descriptor *desc = urb->iso_frame_desc + pack;
if (NULL != subs) {
struct snd_usX2Y_hwdep_pcm_shm *shm = subs->usX2Y->hwdep_pcm_shm;
int head = shm->captured_iso_head + 1;
if (head >= ARRAY_SIZE(shm->captured_iso))
head = 0;
shm->captured_iso[head].frame = urb->start_frame + pack;
shm->captured_iso[head].offset = desc->offset;
shm->captured_iso[head].length = desc->actual_length;
shm->captured_iso_head = head;
shm->captured_iso_frames++;
}
if ((desc->offset += desc->length * NRURBS*nr_of_packs()) +
desc->length >= SSS)
desc->offset -= (SSS - desc->length);
}
}
static inline int usX2Y_usbpcm_usbframe_complete(struct snd_usX2Y_substream *capsubs,
struct snd_usX2Y_substream *capsubs2,
struct snd_usX2Y_substream *playbacksubs,
int frame)
{
int err, state;
struct urb *urb = playbacksubs->completed_urb;
state = atomic_read(&playbacksubs->state);
if (NULL != urb) {
if (state == state_RUNNING)
usX2Y_urb_play_retire(playbacksubs, urb);
else if (state >= state_PRERUNNING)
atomic_inc(&playbacksubs->state);
} else {
switch (state) {
case state_STARTING1:
urb = playbacksubs->urb[0];
atomic_inc(&playbacksubs->state);
break;
case state_STARTING2:
urb = playbacksubs->urb[1];
atomic_inc(&playbacksubs->state);
break;
}
}
if (urb) {
if ((err = usX2Y_hwdep_urb_play_prepare(playbacksubs, urb)) ||
(err = usX2Y_urb_submit(playbacksubs, urb, frame))) {
return err;
}
}
playbacksubs->completed_urb = NULL;
state = atomic_read(&capsubs->state);
if (state >= state_PREPARED) {
if (state == state_RUNNING) {
if ((err = usX2Y_usbpcm_urb_capt_retire(capsubs)))
return err;
} else if (state >= state_PRERUNNING)
atomic_inc(&capsubs->state);
usX2Y_usbpcm_urb_capt_iso_advance(capsubs, capsubs->completed_urb);
if (NULL != capsubs2)
usX2Y_usbpcm_urb_capt_iso_advance(NULL, capsubs2->completed_urb);
if ((err = usX2Y_urb_submit(capsubs, capsubs->completed_urb, frame)))
return err;
if (NULL != capsubs2)
if ((err = usX2Y_urb_submit(capsubs2, capsubs2->completed_urb, frame)))
return err;
}
capsubs->completed_urb = NULL;
if (NULL != capsubs2)
capsubs2->completed_urb = NULL;
return 0;
}
static void i_usX2Y_usbpcm_urb_complete(struct urb *urb)
{
struct snd_usX2Y_substream *subs = urb->context;
struct usX2Ydev *usX2Y = subs->usX2Y;
struct snd_usX2Y_substream *capsubs, *capsubs2, *playbacksubs;
if (unlikely(atomic_read(&subs->state) < state_PREPARED)) {
snd_printdd("hcd_frame=%i ep=%i%s status=%i start_frame=%i\n",
usb_get_current_frame_number(usX2Y->dev),
subs->endpoint, usb_pipein(urb->pipe) ? "in" : "out",
urb->status, urb->start_frame);
return;
}
if (unlikely(urb->status)) {
usX2Y_error_urb_status(usX2Y, subs, urb);
return;
}
if (likely((urb->start_frame & 0xFFFF) == (usX2Y->wait_iso_frame & 0xFFFF)))
subs->completed_urb = urb;
else {
usX2Y_error_sequence(usX2Y, subs, urb);
return;
}
capsubs = usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE];
capsubs2 = usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE + 2];
playbacksubs = usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
if (capsubs->completed_urb && atomic_read(&capsubs->state) >= state_PREPARED &&
(NULL == capsubs2 || capsubs2->completed_urb) &&
(playbacksubs->completed_urb || atomic_read(&playbacksubs->state) < state_PREPARED)) {
if (!usX2Y_usbpcm_usbframe_complete(capsubs, capsubs2, playbacksubs, urb->start_frame))
usX2Y->wait_iso_frame += nr_of_packs();
else {
snd_printdd("\n");
usX2Y_clients_stop(usX2Y);
}
}
}
static void usX2Y_hwdep_urb_release(struct urb **urb)
{
usb_kill_urb(*urb);
usb_free_urb(*urb);
*urb = NULL;
}
/*
* release a substream
*/
static void usX2Y_usbpcm_urbs_release(struct snd_usX2Y_substream *subs)
{
int i;
snd_printdd("snd_usX2Y_urbs_release() %i\n", subs->endpoint);
for (i = 0; i < NRURBS; i++)
usX2Y_hwdep_urb_release(subs->urb + i);
}
static void usX2Y_usbpcm_subs_startup_finish(struct usX2Ydev * usX2Y)
{
usX2Y_urbs_set_complete(usX2Y, i_usX2Y_usbpcm_urb_complete);
usX2Y->prepare_subs = NULL;
}
static void i_usX2Y_usbpcm_subs_startup(struct urb *urb)
{
struct snd_usX2Y_substream *subs = urb->context;
struct usX2Ydev *usX2Y = subs->usX2Y;
struct snd_usX2Y_substream *prepare_subs = usX2Y->prepare_subs;
if (NULL != prepare_subs &&
urb->start_frame == prepare_subs->urb[0]->start_frame) {
atomic_inc(&prepare_subs->state);
if (prepare_subs == usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE]) {
struct snd_usX2Y_substream *cap_subs2 = usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE + 2];
if (cap_subs2 != NULL)
atomic_inc(&cap_subs2->state);
}
usX2Y_usbpcm_subs_startup_finish(usX2Y);
wake_up(&usX2Y->prepare_wait_queue);
}
i_usX2Y_usbpcm_urb_complete(urb);
}
/*
* initialize a substream's urbs
*/
static int usX2Y_usbpcm_urbs_allocate(struct snd_usX2Y_substream *subs)
{
int i;
unsigned int pipe;
int is_playback = subs == subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
struct usb_device *dev = subs->usX2Y->dev;
pipe = is_playback ? usb_sndisocpipe(dev, subs->endpoint) :
usb_rcvisocpipe(dev, subs->endpoint);
subs->maxpacksize = usb_maxpacket(dev, pipe, is_playback);
if (!subs->maxpacksize)
return -EINVAL;
/* allocate and initialize data urbs */
for (i = 0; i < NRURBS; i++) {
struct urb **purb = subs->urb + i;
if (*purb) {
usb_kill_urb(*purb);
continue;
}
*purb = usb_alloc_urb(nr_of_packs(), GFP_KERNEL);
if (NULL == *purb) {
usX2Y_usbpcm_urbs_release(subs);
return -ENOMEM;
}
(*purb)->transfer_buffer = is_playback ?
subs->usX2Y->hwdep_pcm_shm->playback : (
subs->endpoint == 0x8 ?
subs->usX2Y->hwdep_pcm_shm->capture0x8 :
subs->usX2Y->hwdep_pcm_shm->capture0xA);
(*purb)->dev = dev;
(*purb)->pipe = pipe;
(*purb)->number_of_packets = nr_of_packs();
(*purb)->context = subs;
(*purb)->interval = 1;
(*purb)->complete = i_usX2Y_usbpcm_subs_startup;
}
return 0;
}
/*
* free the buffer
*/
static int snd_usX2Y_usbpcm_hw_free(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_usX2Y_substream *subs = runtime->private_data,
*cap_subs2 = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE + 2];
mutex_lock(&subs->usX2Y->prepare_mutex);
snd_printdd("snd_usX2Y_usbpcm_hw_free(%p)\n", substream);
if (SNDRV_PCM_STREAM_PLAYBACK == substream->stream) {
struct snd_usX2Y_substream *cap_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE];
atomic_set(&subs->state, state_STOPPED);
usX2Y_usbpcm_urbs_release(subs);
if (!cap_subs->pcm_substream ||
!cap_subs->pcm_substream->runtime ||
!cap_subs->pcm_substream->runtime->status ||
cap_subs->pcm_substream->runtime->status->state < SNDRV_PCM_STATE_PREPARED) {
atomic_set(&cap_subs->state, state_STOPPED);
if (NULL != cap_subs2)
atomic_set(&cap_subs2->state, state_STOPPED);
usX2Y_usbpcm_urbs_release(cap_subs);
if (NULL != cap_subs2)
usX2Y_usbpcm_urbs_release(cap_subs2);
}
} else {
struct snd_usX2Y_substream *playback_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
if (atomic_read(&playback_subs->state) < state_PREPARED) {
atomic_set(&subs->state, state_STOPPED);
if (NULL != cap_subs2)
atomic_set(&cap_subs2->state, state_STOPPED);
usX2Y_usbpcm_urbs_release(subs);
if (NULL != cap_subs2)
usX2Y_usbpcm_urbs_release(cap_subs2);
}
}
mutex_unlock(&subs->usX2Y->prepare_mutex);
return snd_pcm_lib_free_pages(substream);
}
static void usX2Y_usbpcm_subs_startup(struct snd_usX2Y_substream *subs)
{
struct usX2Ydev * usX2Y = subs->usX2Y;
usX2Y->prepare_subs = subs;
subs->urb[0]->start_frame = -1;
smp_wmb(); // Make sure above modifications are seen by i_usX2Y_subs_startup()
usX2Y_urbs_set_complete(usX2Y, i_usX2Y_usbpcm_subs_startup);
}
static int usX2Y_usbpcm_urbs_start(struct snd_usX2Y_substream *subs)
{
int p, u, err,
stream = subs->pcm_substream->stream;
struct usX2Ydev *usX2Y = subs->usX2Y;
if (SNDRV_PCM_STREAM_CAPTURE == stream) {
usX2Y->hwdep_pcm_shm->captured_iso_head = -1;
usX2Y->hwdep_pcm_shm->captured_iso_frames = 0;
}
for (p = 0; 3 >= (stream + p); p += 2) {
struct snd_usX2Y_substream *subs = usX2Y->subs[stream + p];
if (subs != NULL) {
if ((err = usX2Y_usbpcm_urbs_allocate(subs)) < 0)
return err;
subs->completed_urb = NULL;
}
}
for (p = 0; p < 4; p++) {
struct snd_usX2Y_substream *subs = usX2Y->subs[p];
if (subs != NULL && atomic_read(&subs->state) >= state_PREPARED)
goto start;
}
start:
usX2Y_usbpcm_subs_startup(subs);
for (u = 0; u < NRURBS; u++) {
for (p = 0; 3 >= (stream + p); p += 2) {
struct snd_usX2Y_substream *subs = usX2Y->subs[stream + p];
if (subs != NULL) {
struct urb *urb = subs->urb[u];
if (usb_pipein(urb->pipe)) {
unsigned long pack;
if (0 == u)
atomic_set(&subs->state, state_STARTING3);
urb->dev = usX2Y->dev;
urb->transfer_flags = URB_ISO_ASAP;
for (pack = 0; pack < nr_of_packs(); pack++) {
urb->iso_frame_desc[pack].offset = subs->maxpacksize * (pack + u * nr_of_packs());
urb->iso_frame_desc[pack].length = subs->maxpacksize;
}
urb->transfer_buffer_length = subs->maxpacksize * nr_of_packs();
if ((err = usb_submit_urb(urb, GFP_KERNEL)) < 0) {
snd_printk (KERN_ERR "cannot usb_submit_urb() for urb %d, err = %d\n", u, err);
err = -EPIPE;
goto cleanup;
} else {
snd_printdd("%i\n", urb->start_frame);
if (u == 0)
usX2Y->wait_iso_frame = urb->start_frame;
}
urb->transfer_flags = 0;
} else {
atomic_set(&subs->state, state_STARTING1);
break;
}
}
}
}
err = 0;
wait_event(usX2Y->prepare_wait_queue, NULL == usX2Y->prepare_subs);
if (atomic_read(&subs->state) != state_PREPARED)
err = -EPIPE;
cleanup:
if (err) {
usX2Y_subs_startup_finish(usX2Y); // Call it now
usX2Y_clients_stop(usX2Y); // something is completely wroong > stop evrything
}
return err;
}
/*
* prepare callback
*
* set format and initialize urbs
*/
static int snd_usX2Y_usbpcm_prepare(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_usX2Y_substream *subs = runtime->private_data;
struct usX2Ydev *usX2Y = subs->usX2Y;
struct snd_usX2Y_substream *capsubs = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE];
int err = 0;
snd_printdd("snd_usX2Y_pcm_prepare(%p)\n", substream);
if (NULL == usX2Y->hwdep_pcm_shm) {
if (NULL == (usX2Y->hwdep_pcm_shm = snd_malloc_pages(sizeof(struct snd_usX2Y_hwdep_pcm_shm), GFP_KERNEL)))
return -ENOMEM;
memset(usX2Y->hwdep_pcm_shm, 0, sizeof(struct snd_usX2Y_hwdep_pcm_shm));
}
mutex_lock(&usX2Y->prepare_mutex);
usX2Y_subs_prepare(subs);
// Start hardware streams
// SyncStream first....
if (atomic_read(&capsubs->state) < state_PREPARED) {
if (usX2Y->format != runtime->format)
if ((err = usX2Y_format_set(usX2Y, runtime->format)) < 0)
goto up_prepare_mutex;
if (usX2Y->rate != runtime->rate)
if ((err = usX2Y_rate_set(usX2Y, runtime->rate)) < 0)
goto up_prepare_mutex;
snd_printdd("starting capture pipe for %s\n", subs == capsubs ?
"self" : "playpipe");
if (0 > (err = usX2Y_usbpcm_urbs_start(capsubs)))
goto up_prepare_mutex;
}
if (subs != capsubs) {
usX2Y->hwdep_pcm_shm->playback_iso_start = -1;
if (atomic_read(&subs->state) < state_PREPARED) {
while (usX2Y_iso_frames_per_buffer(runtime, usX2Y) >
usX2Y->hwdep_pcm_shm->captured_iso_frames) {
snd_printdd("Wait: iso_frames_per_buffer=%i,"
"captured_iso_frames=%i\n",
usX2Y_iso_frames_per_buffer(runtime, usX2Y),
usX2Y->hwdep_pcm_shm->captured_iso_frames);
if (msleep_interruptible(10)) {
err = -ERESTARTSYS;
goto up_prepare_mutex;
}
}
if (0 > (err = usX2Y_usbpcm_urbs_start(subs)))
goto up_prepare_mutex;
}
snd_printdd("Ready: iso_frames_per_buffer=%i,captured_iso_frames=%i\n",
usX2Y_iso_frames_per_buffer(runtime, usX2Y),
usX2Y->hwdep_pcm_shm->captured_iso_frames);
} else
usX2Y->hwdep_pcm_shm->capture_iso_start = -1;
up_prepare_mutex:
mutex_unlock(&usX2Y->prepare_mutex);
return err;
}
static struct snd_pcm_hardware snd_usX2Y_4c =
{
.info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER |
SNDRV_PCM_INFO_MMAP_VALID),
.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_3LE,
.rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
.rate_min = 44100,
.rate_max = 48000,
.channels_min = 2,
.channels_max = 4,
.buffer_bytes_max = (2*128*1024),
.period_bytes_min = 64,
.period_bytes_max = (128*1024),
.periods_min = 2,
.periods_max = 1024,
.fifo_size = 0
};
static int snd_usX2Y_usbpcm_open(struct snd_pcm_substream *substream)
{
struct snd_usX2Y_substream *subs = ((struct snd_usX2Y_substream **)
snd_pcm_substream_chip(substream))[substream->stream];
struct snd_pcm_runtime *runtime = substream->runtime;
if (!(subs->usX2Y->chip_status & USX2Y_STAT_CHIP_MMAP_PCM_URBS))
return -EBUSY;
runtime->hw = SNDRV_PCM_STREAM_PLAYBACK == substream->stream ? snd_usX2Y_2c :
(subs->usX2Y->subs[3] ? snd_usX2Y_4c : snd_usX2Y_2c);
runtime->private_data = subs;
subs->pcm_substream = substream;
snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 1000, 200000);
return 0;
}
static int snd_usX2Y_usbpcm_close(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_usX2Y_substream *subs = runtime->private_data;
subs->pcm_substream = NULL;
return 0;
}
static struct snd_pcm_ops snd_usX2Y_usbpcm_ops =
{
.open = snd_usX2Y_usbpcm_open,
.close = snd_usX2Y_usbpcm_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = snd_usX2Y_pcm_hw_params,
.hw_free = snd_usX2Y_usbpcm_hw_free,
.prepare = snd_usX2Y_usbpcm_prepare,
.trigger = snd_usX2Y_pcm_trigger,
.pointer = snd_usX2Y_pcm_pointer,
};
static int usX2Y_pcms_lock_check(struct snd_card *card)
{
struct list_head *list;
struct snd_device *dev;
struct snd_pcm *pcm;
int err = 0;
list_for_each(list, &card->devices) {
dev = snd_device(list);
if (dev->type != SNDRV_DEV_PCM)
continue;
pcm = dev->device_data;
mutex_lock(&pcm->open_mutex);
}
list_for_each(list, &card->devices) {
int s;
dev = snd_device(list);
if (dev->type != SNDRV_DEV_PCM)
continue;
pcm = dev->device_data;
for (s = 0; s < 2; ++s) {
struct snd_pcm_substream *substream;
substream = pcm->streams[s].substream;
if (substream && SUBSTREAM_BUSY(substream))
err = -EBUSY;
}
}
return err;
}
static void usX2Y_pcms_unlock(struct snd_card *card)
{
struct list_head *list;
struct snd_device *dev;
struct snd_pcm *pcm;
list_for_each(list, &card->devices) {
dev = snd_device(list);
if (dev->type != SNDRV_DEV_PCM)
continue;
pcm = dev->device_data;
mutex_unlock(&pcm->open_mutex);
}
}
static int snd_usX2Y_hwdep_pcm_open(struct snd_hwdep *hw, struct file *file)
{
// we need to be the first
struct snd_card *card = hw->card;
int err = usX2Y_pcms_lock_check(card);
if (0 == err)
usX2Y(card)->chip_status |= USX2Y_STAT_CHIP_MMAP_PCM_URBS;
usX2Y_pcms_unlock(card);
return err;
}
static int snd_usX2Y_hwdep_pcm_release(struct snd_hwdep *hw, struct file *file)
{
struct snd_card *card = hw->card;
int err = usX2Y_pcms_lock_check(card);
if (0 == err)
usX2Y(hw->card)->chip_status &= ~USX2Y_STAT_CHIP_MMAP_PCM_URBS;
usX2Y_pcms_unlock(card);
return err;
}
static void snd_usX2Y_hwdep_pcm_vm_open(struct vm_area_struct *area)
{
}
static void snd_usX2Y_hwdep_pcm_vm_close(struct vm_area_struct *area)
{
}
static int snd_usX2Y_hwdep_pcm_vm_fault(struct vm_area_struct *area,
struct vm_fault *vmf)
{
unsigned long offset;
void *vaddr;
offset = vmf->pgoff << PAGE_SHIFT;
vaddr = (char*)((struct usX2Ydev *)area->vm_private_data)->hwdep_pcm_shm + offset;
vmf->page = virt_to_page(vaddr);
get_page(vmf->page);
return 0;
}
static const struct vm_operations_struct snd_usX2Y_hwdep_pcm_vm_ops = {
.open = snd_usX2Y_hwdep_pcm_vm_open,
.close = snd_usX2Y_hwdep_pcm_vm_close,
.fault = snd_usX2Y_hwdep_pcm_vm_fault,
};
static int snd_usX2Y_hwdep_pcm_mmap(struct snd_hwdep * hw, struct file *filp, struct vm_area_struct *area)
{
unsigned long size = (unsigned long)(area->vm_end - area->vm_start);
struct usX2Ydev *usX2Y = hw->private_data;
if (!(usX2Y->chip_status & USX2Y_STAT_CHIP_INIT))
return -EBUSY;
/* if userspace tries to mmap beyond end of our buffer, fail */
if (size > PAGE_ALIGN(sizeof(struct snd_usX2Y_hwdep_pcm_shm))) {
snd_printd("%lu > %lu\n", size, (unsigned long)sizeof(struct snd_usX2Y_hwdep_pcm_shm));
return -EINVAL;
}
if (!usX2Y->hwdep_pcm_shm) {
return -ENODEV;
}
area->vm_ops = &snd_usX2Y_hwdep_pcm_vm_ops;
area->vm_flags |= VM_RESERVED | VM_DONTEXPAND;
area->vm_private_data = hw->private_data;
return 0;
}
static void snd_usX2Y_hwdep_pcm_private_free(struct snd_hwdep *hwdep)
{
struct usX2Ydev *usX2Y = hwdep->private_data;
if (NULL != usX2Y->hwdep_pcm_shm)
snd_free_pages(usX2Y->hwdep_pcm_shm, sizeof(struct snd_usX2Y_hwdep_pcm_shm));
}
int usX2Y_hwdep_pcm_new(struct snd_card *card)
{
int err;
struct snd_hwdep *hw;
struct snd_pcm *pcm;
struct usb_device *dev = usX2Y(card)->dev;
if (1 != nr_of_packs())
return 0;
if ((err = snd_hwdep_new(card, SND_USX2Y_USBPCM_ID, 1, &hw)) < 0)
return err;
hw->iface = SNDRV_HWDEP_IFACE_USX2Y_PCM;
hw->private_data = usX2Y(card);
hw->private_free = snd_usX2Y_hwdep_pcm_private_free;
hw->ops.open = snd_usX2Y_hwdep_pcm_open;
hw->ops.release = snd_usX2Y_hwdep_pcm_release;
hw->ops.mmap = snd_usX2Y_hwdep_pcm_mmap;
hw->exclusive = 1;
sprintf(hw->name, "/proc/bus/usb/%03d/%03d/hwdeppcm", dev->bus->busnum, dev->devnum);
err = snd_pcm_new(card, NAME_ALLCAPS" hwdep Audio", 2, 1, 1, &pcm);
if (err < 0) {
return err;
}
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_usX2Y_usbpcm_ops);
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_usX2Y_usbpcm_ops);
pcm->private_data = usX2Y(card)->subs;
pcm->info_flags = 0;
sprintf(pcm->name, NAME_ALLCAPS" hwdep Audio");
if (0 > (err = snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream,
SNDRV_DMA_TYPE_CONTINUOUS,
snd_dma_continuous_data(GFP_KERNEL),
64*1024, 128*1024)) ||
0 > (err = snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream,
SNDRV_DMA_TYPE_CONTINUOUS,
snd_dma_continuous_data(GFP_KERNEL),
64*1024, 128*1024))) {
return err;
}
return 0;
}
#else
int usX2Y_hwdep_pcm_new(struct snd_card *card)
{
return 0;
}
#endif